Chapter 1: Exploring Geometry

Segment
Ray
Angle
Length of line AB
Measure of an angle
Complementary Angles
Supplementary Angles
Right Angle
Acute Angle
Obtuse Angle
Perpendicular and Parallel Lines
Bisector and Midpoint
Translation
Rotation
Reflection
Horizontal and Vertical Translations
Reflection across the x- or y- axis
180 Degrees Rotation About the Origin

Chapter 2: Reasoning in Geometry

Adjacent Angles

Chapter 3: Parallels and Polygons

Polygon
Reflectional Symmetry
Equilateral Triangle
Isosceles Triangle
Scalene Triangle
Rotational Symmetry
Transversal
Midsegment of a Triangle
Midsegment of a Trapezoid
Slope

Chapter 4: Triangle Congruence

No Definitions

Chapter 5: Perimeter and Area

Perimeter
Area
Parts of a Triangle
Parts of a Parallelogram
Parts of a Trapezoid
Circle

Chapter 6: Shapes in Space

Polyhedron
Parallel Planes
A Line Perpendicular to a Plane
A Line Parallel to a Plane
Dihedral Angle
Measure of a Dihedral Angle

Chapter 7: Surface Area and Volume

No Definitions

Chapter 8: Similar Shapes

Similar Figures

Chapter 9: Circles

Circle
Central Angle and Intercepted Arc
Degree Measure of Arcs
Secants and Tangents

Chapter 10: Trigonometry

Tangent Ratio
Sine Ratio
Cosine Ratio
Two Trigonometry Identities
The Law of Sines
The Law of Cosines
Unit Circle Definition of Sine and Cosine

Chapter 11: Taxicabs, Fractals, and More

Affline Transformation
Main Features of Projective Geometry

Chapter 12: A Closer Look at Proof and Logic

No Definitions

Shapes

Trapezoid
Parallelogram
Rhombus
Rectangle
Square
Prisms
Circle